Stadium: Court B5 Round: 25 Ground: Hardcourt outdoor
| ITF W25 Yokohama | 2020/03/05 02:00 | Mei Yamaguchi v Momoko Kobori | 5-7,6-1,6-3 |
| Makinohara, Singles Qualifying W-WITF-JPN-15A | 2018/10/11 02:55 | Momoko Kobori v Mei Yamaguchi | 6-1,6-3 |
| ITF Women Gifu | 2018/05/01 01:00 | Mei Yamaguchi v Momoko Kobori | 6-4,3-6,3-6 |
| Osaka, Singles W-ITF-JPN-02A | 2023/04/13 00:55 | Garcia Perez, Georgina v Momoko Kobori | 6-4,6-1 |
| Kashiwa, Qualifications Simples W-ITF-JPN-07A | 2023/04/06 05:50 | Su Jeong Jang v Momoko Kobori | 6-3,7-6 |
| Kashiwa, Qualifications Simples W-ITF-JPN-07A | 2023/04/05 05:45 | Momoko Kobori v Ya-Hsuan Lee | 6-4,7-6 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2023/03/31 01:00 | Momoko Kobori v Na-Lae Han | 3-6,1-6 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2023/03/30 01:30 | Momoko Kobori v Hozumi, Eri | 6-4,7-6 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2023/03/29 07:15 | Momoko Kobori v Erika Sema | 6-4,7-6 |
| ITF W60 Astana | 2023/03/08 04:00 | Momoko Kobori v Anastasia Tikhonova | 5-7,1-6 |
| ITF W60 Astana | 2023/03/07 04:00 | Momoko Kobori v Ekaterina Kazionova | 1-6,6-4,7-6 |
| Gifu, Singles W-ITF-JPN-09A | 2023/05/01 06:55 | Yeon Woo Ku v Mei Yamaguchi | 4-6,6-7 |
| Gifu, Singles W-ITF-JPN-09A | 2023/05/01 02:30 | Himari Sato v Mei Yamaguchi | 0-6,3-6 |
| Osaka, Singles W-ITF-JPN-02A | 2023/04/12 00:55 | Mei Yamaguchi v Kyoka Okamura | 6-2,4-6,4-6 |
| Osaka, Singles W-ITF-JPN-02A | 2023/04/10 04:45 | Chihiro Muramatsu v Mei Yamaguchi | 1-6,6-7 |
| Osaka, Singles W-ITF-JPN-02A | 2023/04/10 01:00 | Honoka Kobayashi v Mei Yamaguchi | 5-7,3-6 |
| Osaka, Singles W-ITF-JPN-02A | 2023/04/09 01:00 | Nagomi Higashitani v Mei Yamaguchi | 3-6,1-6 |
| Kashiwa, Qualifications Simples W-ITF-JPN-07A | 2023/04/03 03:00 | Ya-Hsuan Lee v Mei Yamaguchi | 6-3,6-1 |
| Kofu, Qualifications Simples W-ITF-JPN-05A | 2023/03/28 03:45 | Garcia Perez, Georgina v Mei Yamaguchi | 6-3,5-7,11-9 |